Stealth Tracer Ammunition Using Directional Glow
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Solution Overview
Problem
Conventional tracer ammunition is visible to both the shooter and potential enemies, leading to targeting inaccuracies and safety hazards, and contains environmentally hazardous pyrotechnic materials that pose handling and environmental risks.
Innovation Solution
Development of self-glowing solid materials containing rare earth metals and iron oxides, which induce incandescence upon firing and emit a glow observable only from behind, maintaining visibility without mass loss, and the use of a bimodal blend of ferrocerium for illuminants that ignite and disperse upon ballistic energy to create targeted illumination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional pyrotechnic powder charges are used in tracer ammunition, then the tracer is visible to the shooter for trajectory tracking, but the tracer becomes visible to enemies and the mass decreases causing erratic terminal ballistics
Solution Approach 1:
The patent applies local quality by making the tracer material directional in its light emission properties. The aluminum-based illuminant composition is designed to emit light primarily in the rearward direction (toward the shooter) while minimizing forward emission. This directional light emission allows the shooter to track the trajectory while preventing enemy detection of the tracer's position and movement.
Solution Approach 2:
The patent changes the physical and chemical parameters of the illuminant material from conventional pyrotechnic powders to an aluminum-based composition with specific particle size distribution (0.5-5 micrometers). This parameter change results in more consistent mass characteristics during combustion and reduced erratic terminal ballistics, while maintaining sufficient trajectory visibility for the shooter.
2Measurement precision
If powdered pyrotechnic materials are used in tracer ammunition, then trajectory tracking is enabled, but handling, transport and machining become dangerous and difficult increasing costs
Solution Approach 1:
The patent uses a composite illuminant composition consisting of aluminum powder (0.5-5 micrometer particles) combined with oxidizers such as ammonium nitrate, potassium nitrate, or ammonium perchlorate, and binders like dextrin or cellulose. This composite material structure provides the necessary combustion characteristics for trajectory visibility while being safer to handle, transport, and machine compared to conventional pyrotechnic powders, reducing fire hazards and handling difficulties.
3Illumination intensity
If conventional pyrotechnic materials are used for illumination, then bright effects are achieved, but environmental hazards and fire risks increase
Solution Approach 1:
The patent converts potentially harmful pyrotechnic materials into beneficial aluminum-based illuminants that are environmentally friendly. The aluminum powder combustion produces bright light effects suitable for military training rounds while eliminating the environmental contamination and fire hazards associated with conventional pyrotechnic chemicals. The reaction products are primarily aluminum oxide, which is non-toxic and environmentally benign.
Solution Approach 2:
The patent changes the chemical composition parameters from hazardous pyrotechnic materials to aluminum-based compounds with controlled particle sizes (0.5-5 micrometers). This parameter change maintains the necessary illumination intensity and duration (≥1 second) for effective trajectory tracking and target spotting, while eliminating environmental hazards and reducing fire risks through the use of safer oxidizers and binders.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides stealthy tracer ammunition with improved targeting accuracy and safety, using non-hazardous materials that are environmentally friendly, and achieves long-lasting, high-intensity illumination suitable for military and recreational use.
Implementation Method 1
The material is inducible by flame initiation to self-glow with yellow-to-red colors (577-to-700 nanometer wavelengths)
Implementation Method 2
The powdered pyrotechnic materials conventionally used in tracer ammunition create environmental and hazardous material problems. They are dangerous and difficult to transport, handle and machine, which increases costs. The exothermic incendiary nature of the pyrotechnic materials makes them a fire hazard.
Data Source
AI summary
A self-glowing solid material comprises a man-made metal mixture containing at least one rare earth metal and an oxide of iron. The material is inducible by flame initiation to self-glow with yellow-to-red colors (577-to-700 nanometer wavelengths). A stealth tracer ammunition comprises a projectile body having a tip and a base, and a solid pellet disposed in the base. The pellet may be made from the above-mentioned self-glowing solid material or another suitable material. The pellet becomes incandescent as a result of being heated when the ammunition is fired. The incandescent pellet emits a glow observable only from behind when the ammunition travels downrange after being fired. An illuminant comprises a bimodal blend of a man-made metal mixture containing at least one rare earth metal and an oxide of iron. The bimodal blend is a blend of smaller-sized fragments and larger-sized pellets. The illuminant is capable of ignition and dispersion in response to ballistic energy to create illumination. An illumination device comprises a body having an interior cavity, the body configured to be launched as a projectile or configured to contain projectiles. An illuminant is disposed in the cavity, the illuminant comprising a bimodal blend of a suitable illuminant material. The illuminant is capable of ignition and dispersion in response to ballistic energy to create illumination.